/*
 * Copyright (C) 2009 M. Hautle.
 * 
 * This file is part of TrackedBean.
 * 
 * TrackedBean is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * TrackedBean is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with TrackedBean. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.trackedbean.copier.engine;

import ch.trackedbean.copier.*;
import ch.trackedbean.copier.annotations.*;
import ch.trackedbean.loaders.lazy.*;

/**
 * Some default {@link IMappingFilter}s.
 * 
 * @author M. Hautle
 */
public enum DefaultMappingTypes implements IMappingFilter {
	/** Copy all attributes excepting those annotated with {@link LoadLazy}. */
	NO_LAZY {
		@Override
		public boolean check(AbstractSimpleMappingHolder h) {
			return !h.isLazy();
		}
	},
	/** Copy all attributes excepting those annotated with {@link DeepMapping}. */
	NO_DEEP {
		@Override
		public boolean check(AbstractSimpleMappingHolder h) {
			return !(h instanceof DeepMappingHolder);
		}
	},
	/** Copy all attributes excepting those annotated with {@link DeepMapping} or {@link LoadLazy}. */
	FLAT {
		@Override
		public boolean check(AbstractSimpleMappingHolder h) {
			return !(h.isLazy() || h instanceof DeepMappingHolder);
		}
	},
	/** Copy all attributes. */
	ALL {
		@Override
		public boolean check(AbstractSimpleMappingHolder h) {
			return true;
		}
	};

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean copyDst2Src(IMappingHolder holder) {
		if (holder instanceof AbstractSimpleMappingHolder)
			return check((AbstractSimpleMappingHolder) holder);
		return true;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean copySrc2Dst(IMappingHolder holder) {
		if (holder instanceof AbstractSimpleMappingHolder)
			return check((AbstractSimpleMappingHolder) holder);
		return true;
	}

	/**
	 * Checks if the property should be copied.
	 * 
	 * @param holder The mapping to check
	 * @return True if the value should be copied
	 */
	abstract boolean check(AbstractSimpleMappingHolder holder);
}
